mirror of
https://github.com/bjc/prosody.git
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192 lines
7.3 KiB
Lua
192 lines
7.3 KiB
Lua
-- Prosody IM
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-- Copyright (C) 2008-2009 Matthew Wild
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-- Copyright (C) 2008-2009 Waqas Hussain
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--
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-- This project is MIT/X11 licensed. Please see the
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-- COPYING file in the source package for more information.
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--
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local log = require "util.logger".init("stanzarouter")
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local hosts = _G.hosts;
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local tostring = tostring;
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local st = require "util.stanza";
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local send_s2s = require "core.s2smanager".send_to_host;
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local modules_handle_stanza = require "core.modulemanager".handle_stanza;
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local component_handle_stanza = require "core.componentmanager".handle_stanza;
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local jid_split = require "util.jid".split;
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local jid_prepped_split = require "util.jid".prepped_split;
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function core_process_stanza(origin, stanza)
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(origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:top_tag())
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-- Currently we guarantee every stanza to have an xmlns, should we keep this rule?
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if not stanza.attr.xmlns then stanza.attr.xmlns = "jabber:client"; end
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-- TODO verify validity of stanza (as well as JID validity)
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if stanza.attr.type == "error" and #stanza.tags == 0 then return; end -- TODO invalid stanza, log
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if stanza.name == "iq" then
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if (stanza.attr.type == "set" or stanza.attr.type == "get") and #stanza.tags ~= 1 then
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origin.send(st.error_reply(stanza, "modify", "bad-request"));
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return;
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end
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end
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if origin.type == "c2s" then
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if not origin.full_jid
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and not(stanza.name == "iq" and stanza.attr.type == "set" and stanza.tags[1] and stanza.tags[1].name == "bind"
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and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then
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-- authenticated client isn't bound and current stanza is not a bind request
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origin.send(st.error_reply(stanza, "auth", "not-authorized")); -- FIXME maybe allow stanzas to account or server
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return;
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end
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-- TODO also, stanzas should be returned to their original state before the function ends
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stanza.attr.from = origin.full_jid;
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end
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local to, xmlns = stanza.attr.to, stanza.attr.xmlns;
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local from = stanza.attr.from;
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local node, host, resource;
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local from_node, from_host, from_resource;
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local to_bare, from_bare;
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if to then
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if full_sessions[to] or bare_sessions[to] or hosts[to] then
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node, host = jid_split(to); -- TODO only the host is needed, optimize
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else
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node, host, resource = jid_prepped_split(to);
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if not host then
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log("warn", "Received stanza with invalid destination JID: %s", to);
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if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
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origin.send(st.error_reply(stanza, "modify", "jid-malformed", "The destination address is invalid: "..to));
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end
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return;
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end
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to_bare = node and (node.."@"..host) or host; -- bare JID
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if resource then to = to_bare.."/"..resource; else to = to_bare; end
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stanza.attr.to = to;
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end
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end
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if from and not origin.full_jid then
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-- We only stamp the 'from' on c2s stanzas, so we still need to check validity
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from_node, from_host, from_resource = jid_prepped_split(from);
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if not from_host then
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log("warn", "Received stanza with invalid source JID: %s", from);
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if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
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origin.send(st.error_reply(stanza, "modify", "jid-malformed", "The source address is invalid: "..from));
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end
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return;
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end
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from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
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if from_resource then from = from_bare.."/"..from_resource; else from = from_bare; end
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stanza.attr.from = from;
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end
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--[[if to and not(hosts[to]) and not(hosts[to_bare]) and (hosts[host] and hosts[host].type ~= "local") then -- not for us?
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log("warn", "stanza recieved for a non-local server");
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return; -- FIXME what should we do here?
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end]] -- FIXME
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if (origin.type == "s2sin" or origin.type == "c2s" or origin.type == "component") and xmlns == "jabber:client" then
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if origin.type == "s2sin" and not origin.dummy then
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local host_status = origin.hosts[from_host];
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if not host_status or not host_status.authed then -- remote server trying to impersonate some other server?
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log("warn", "Received a stanza claiming to be from %s, over a stream authed for %s!", from_host, origin.from_host);
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return; -- FIXME what should we do here? does this work with subdomains?
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end
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end
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core_post_stanza(origin, stanza);
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else
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local h = hosts[stanza.attr.to or origin.host or origin.to_host];
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if h then
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local event;
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if stanza.attr.xmlns == "jabber:client" then
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if stanza.name == "iq" and (stanza.attr.type == "set" or stanza.attr.type == "get") then
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event = "stanza/iq/"..stanza.tags[1].attr.xmlns..":"..stanza.tags[1].name;
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else
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event = "stanza/"..stanza.name;
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end
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else
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event = "stanza/"..stanza.attr.xmlns..":"..stanza.name;
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end
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if h.events.fire_event(event, {origin = origin, stanza = stanza}) then return; end
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end
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if host and not hosts[host] then host = nil; end -- workaround for a Pidgin bug which sets 'to' to the SRV result
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modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
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end
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end
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function core_post_stanza(origin, stanza)
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local to = stanza.attr.to;
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local node, host, resource = jid_split(to);
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local to_bare = node and (node.."@"..host) or host; -- bare JID
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local to_type;
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if node then
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if resource then
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to_type = '/full';
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else
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to_type = '/bare';
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if node == origin.username and host == origin.host then
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stanza.attr.to = nil;
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end
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end
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else
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if host then
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to_type = '/host';
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else
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to_type = '/bare';
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end
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end
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local event_data = {origin=origin, stanza=stanza};
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if origin.full_jid == stanza.attr.from then -- c2s connection
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if hosts[origin.host].events.fire_event('pre-'..stanza.name..to_type, event_data) then return; end -- do preprocessing
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end
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local h = hosts[to_bare] or hosts[host or origin.host];
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if h then
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if h.events.fire_event(stanza.name..to_type, event_data) then return; end -- do processing
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if h.type == "component" then
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component_handle_stanza(origin, stanza);
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return;
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end
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modules_handle_stanza(h.host, origin, stanza);
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else
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core_route_stanza(origin, stanza);
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end
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end
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function core_route_stanza(origin, stanza)
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local node, host, resource = jid_split(stanza.attr.to);
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local from_node, from_host, from_resource = jid_split(stanza.attr.from);
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-- Auto-detect origin if not specified
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origin = origin or hosts[from_host];
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if not origin then return false; end
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if hosts[host] then
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-- old stanza routing code removed
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core_post_stanza(origin, stanza);
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elseif origin.type == "c2s" then
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-- Remote host
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if not hosts[from_host] then
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log("error", "No hosts[from_host] (please report): %s", tostring(stanza));
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end
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if (not hosts[from_host]) or (not hosts[from_host].disallow_s2s) then
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local xmlns = stanza.attr.xmlns;
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--stanza.attr.xmlns = "jabber:server";
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stanza.attr.xmlns = nil;
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log("debug", "sending s2s stanza: %s", tostring(stanza));
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send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
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stanza.attr.xmlns = xmlns; -- reset
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else
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core_route_stanza(hosts[from_host], st.error_reply(stanza, "cancel", "not-allowed", "Communication with remote servers is not allowed"));
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end
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elseif origin.type == "component" or origin.type == "local" then
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-- Route via s2s for components and modules
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log("debug", "Routing outgoing stanza for %s to %s", from_host, host);
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send_s2s(from_host, host, stanza);
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else
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log("warn", "received stanza from unhandled connection type: %s", origin.type);
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end
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end
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